Revert "Remove dependency on mapDB project - adding pom.xml dependency is enough :)"

This reverts commit e86b9181913d97c24a5237030f3dd1822be48d0f.
Change takeRemoteSnapshot to use Stream/File and SAX Parser instead of jdom/Document for building remote node tree.
Fixing of broken synchronisation.
Applying input stream/file parsing of remote tree to nodes structure.